linux/fs/xfs/xfs_types.h
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   1/*
   2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it would be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write the Free Software Foundation,
  16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18#ifndef __XFS_TYPES_H__
  19#define __XFS_TYPES_H__
  20
  21#ifdef __KERNEL__
  22
  23/*
  24 * Additional type declarations for XFS
  25 */
  26typedef signed char             __int8_t;
  27typedef unsigned char           __uint8_t;
  28typedef signed short int        __int16_t;
  29typedef unsigned short int      __uint16_t;
  30typedef signed int              __int32_t;
  31typedef unsigned int            __uint32_t;
  32typedef signed long long int    __int64_t;
  33typedef unsigned long long int  __uint64_t;
  34
  35typedef enum { B_FALSE,B_TRUE } boolean_t;
  36typedef __uint32_t              prid_t;         /* project ID */
  37typedef __uint32_t              inst_t;         /* an instruction */
  38
  39typedef __s64                   xfs_off_t;      /* <file offset> type */
  40typedef unsigned long long      xfs_ino_t;      /* <inode> type */
  41typedef __s64                   xfs_daddr_t;    /* <disk address> type */
  42typedef char *                  xfs_caddr_t;    /* <core address> type */
  43typedef __u32                   xfs_dev_t;
  44typedef __u32                   xfs_nlink_t;
  45
  46/* __psint_t is the same size as a pointer */
  47#if (BITS_PER_LONG == 32)
  48typedef __int32_t __psint_t;
  49typedef __uint32_t __psunsigned_t;
  50#elif (BITS_PER_LONG == 64)
  51typedef __int64_t __psint_t;
  52typedef __uint64_t __psunsigned_t;
  53#else
  54#error BITS_PER_LONG must be 32 or 64
  55#endif
  56
  57#endif  /* __KERNEL__ */
  58
  59typedef __uint32_t      xfs_agblock_t;  /* blockno in alloc. group */
  60typedef __uint32_t      xfs_agino_t;    /* inode # within allocation grp */
  61typedef __uint32_t      xfs_extlen_t;   /* extent length in blocks */
  62typedef __uint32_t      xfs_agnumber_t; /* allocation group number */
  63typedef __int32_t       xfs_extnum_t;   /* # of extents in a file */
  64typedef __int16_t       xfs_aextnum_t;  /* # extents in an attribute fork */
  65typedef __int64_t       xfs_fsize_t;    /* bytes in a file */
  66typedef __uint64_t      xfs_ufsize_t;   /* unsigned bytes in a file */
  67
  68typedef __int32_t       xfs_suminfo_t;  /* type of bitmap summary info */
  69typedef __int32_t       xfs_rtword_t;   /* word type for bitmap manipulations */
  70
  71typedef __int64_t       xfs_lsn_t;      /* log sequence number */
  72typedef __int32_t       xfs_tid_t;      /* transaction identifier */
  73
  74typedef __uint32_t      xfs_dablk_t;    /* dir/attr block number (in file) */
  75typedef __uint32_t      xfs_dahash_t;   /* dir/attr hash value */
  76
  77/*
  78 * These types are 64 bits on disk but are either 32 or 64 bits in memory.
  79 * Disk based types:
  80 */
  81typedef __uint64_t      xfs_dfsbno_t;   /* blockno in filesystem (agno|agbno) */
  82typedef __uint64_t      xfs_drfsbno_t;  /* blockno in filesystem (raw) */
  83typedef __uint64_t      xfs_drtbno_t;   /* extent (block) in realtime area */
  84typedef __uint64_t      xfs_dfiloff_t;  /* block number in a file */
  85typedef __uint64_t      xfs_dfilblks_t; /* number of blocks in a file */
  86
  87/*
  88 * Memory based types are conditional.
  89 */
  90#if XFS_BIG_BLKNOS
  91typedef __uint64_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  92typedef __uint64_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
  93typedef __uint64_t      xfs_rtblock_t;  /* extent (block) in realtime area */
  94typedef __int64_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
  95#else
  96typedef __uint32_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  97typedef __uint32_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
  98typedef __uint32_t      xfs_rtblock_t;  /* extent (block) in realtime area */
  99typedef __int32_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
 100#endif
 101typedef __uint64_t      xfs_fileoff_t;  /* block number in a file */
 102typedef __int64_t       xfs_sfiloff_t;  /* signed block number in a file */
 103typedef __uint64_t      xfs_filblks_t;  /* number of blocks in a file */
 104
 105
 106/*
 107 * Null values for the types.
 108 */
 109#define NULLDFSBNO      ((xfs_dfsbno_t)-1)
 110#define NULLDRFSBNO     ((xfs_drfsbno_t)-1)
 111#define NULLDRTBNO      ((xfs_drtbno_t)-1)
 112#define NULLDFILOFF     ((xfs_dfiloff_t)-1)
 113
 114#define NULLFSBLOCK     ((xfs_fsblock_t)-1)
 115#define NULLRFSBLOCK    ((xfs_rfsblock_t)-1)
 116#define NULLRTBLOCK     ((xfs_rtblock_t)-1)
 117#define NULLFILEOFF     ((xfs_fileoff_t)-1)
 118
 119#define NULLAGBLOCK     ((xfs_agblock_t)-1)
 120#define NULLAGNUMBER    ((xfs_agnumber_t)-1)
 121#define NULLEXTNUM      ((xfs_extnum_t)-1)
 122
 123#define NULLCOMMITLSN   ((xfs_lsn_t)-1)
 124
 125#define NULLFSINO       ((xfs_ino_t)-1)
 126#define NULLAGINO       ((xfs_agino_t)-1)
 127
 128/*
 129 * Max values for extlen, extnum, aextnum.
 130 */
 131#define MAXEXTLEN       ((xfs_extlen_t)0x001fffff)      /* 21 bits */
 132#define MAXEXTNUM       ((xfs_extnum_t)0x7fffffff)      /* signed int */
 133#define MAXAEXTNUM      ((xfs_aextnum_t)0x7fff)         /* signed short */
 134
 135/*
 136 * Minimum and maximum blocksize and sectorsize.
 137 * The blocksize upper limit is pretty much arbitrary.
 138 * The sectorsize upper limit is due to sizeof(sb_sectsize).
 139 */
 140#define XFS_MIN_BLOCKSIZE_LOG   9       /* i.e. 512 bytes */
 141#define XFS_MAX_BLOCKSIZE_LOG   16      /* i.e. 65536 bytes */
 142#define XFS_MIN_BLOCKSIZE       (1 << XFS_MIN_BLOCKSIZE_LOG)
 143#define XFS_MAX_BLOCKSIZE       (1 << XFS_MAX_BLOCKSIZE_LOG)
 144#define XFS_MIN_SECTORSIZE_LOG  9       /* i.e. 512 bytes */
 145#define XFS_MAX_SECTORSIZE_LOG  15      /* i.e. 32768 bytes */
 146#define XFS_MIN_SECTORSIZE      (1 << XFS_MIN_SECTORSIZE_LOG)
 147#define XFS_MAX_SECTORSIZE      (1 << XFS_MAX_SECTORSIZE_LOG)
 148
 149/*
 150 * Min numbers of data/attr fork btree root pointers.
 151 */
 152#define MINDBTPTRS      3
 153#define MINABTPTRS      2
 154
 155/*
 156 * MAXNAMELEN is the length (including the terminating null) of
 157 * the longest permissible file (component) name.
 158 */
 159#define MAXNAMELEN      256
 160
 161typedef enum {
 162        XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 163} xfs_lookup_t;
 164
 165typedef enum {
 166        XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
 167        XFS_BTNUM_MAX
 168} xfs_btnum_t;
 169
 170struct xfs_name {
 171        const unsigned char     *name;
 172        int                     len;
 173};
 174
 175#endif  /* __XFS_TYPES_H__ */
 176
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